eco-friendly protocol for the chemoselective protection of benzylic and primary and less hindered secondary aliphatic alcohols and phenols as trimethylsilyl ethers and different types of amines as N-tert-butylcarbamates is developed using rice husk (RiH) as the catalyst. This reagent is also able to catalyze the acetylation of alcohols, phenols, thiols and amines with acetic anhydride. Easy work-up, relatively
Mild and efficient silylation of alcohols and phenols with HMDS using Bi(OTf)3 under solvent-free condition
作者:Santosh T. Kadam、Sung Soo Kim
DOI:10.1016/j.jorganchem.2009.04.001
日期:2009.7
A very efficient and mildsilylation of alcohols and phenols with hexamethyldisilazane (HMDS) at rt is developed using Bi(OTf)3 as the catalyst. Primary, secondary and tertiary alcohols as well as phenols are excellently converted into corresponding TMS ethers in a very short reaction time. This procedure can also be applied to large scale silylation for industrial application.
Catalyst-free silylation of alcohols and phenols by promoting HMDS in CH<sub>3</sub>NO<sub>2</sub>as solvent
作者:Santosh T. Kadam、Sung Soo Kim
DOI:10.1039/b913398d
日期:——
An uncatalyzed method for the silylation of alcohols and phenols with HMDS in CH3NO2 at rt is developed. A diverse range of aromatic and aliphatic alcohols as well as phenols undergo the silylation in very short reaction time with excellent yield. The uncatalyzed reaction requires neither elevated temperature nor high pressure for the silylation.
Fast and efficient method for Silylation of alcohols and phenols with HMDS in the presence of bis-thiourea complexes of cobalt, nickel, copper and zinc chlorides
作者:Behzad Zeynizadeh、Serve Sorkhabi
DOI:10.1080/10426507.2017.1417294
日期:2018.3.4
GRAPHICAL ABSTRACT ABSTRACT Bis-thiourea complexes of cobalt, nickel, copper and zinc chlorides were usedefficiently for rapid and efficient trimethylsilylation of alcohols and phenols with hexamethyldisilazane (HMDS) in CH3CN. All reactions were carried out at roomtemperature within immediate-120 min timeframe to afford trimethylsilyl ether derivatives in high to excellent yields. Investigation
A novel and highly efficient method for the silylation of alcohols with hexamethyldisilazane (HMDS) catalyzed by recyclable sulfonic acid-functionalized ordered nanoporous silica
作者:Daryoush Zareyee、Babak Karimi
DOI:10.1016/j.tetlet.2006.12.030
日期:2007.2
Silylation of alcohols with hexamethyldisilazane (HMDS) in dichloromethane provides the corresponding silyl ethers in almost quantitative yields at room temperature using 1–3 mol % of sulfonic acid-functionalized silica. Additionally, the catalyst displays a high activity and thermal stability (up to 240 °C) and it can be easily recovered and reused for at least 20 reaction cycles without loss of reactivity